Illinois Population By Ancestry in 2021 (ACS-5Yrs)
Updated on March 3, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, among the 12.82M Illinois population, 4.48M had Other Groups ancestry (34.92%), 2.60M had Unclassified ancestry (20.25%), and 2.15M had German ancestry (16.78%).
The chart below shows the top 10 ancestry groups by percentage, and the table below shows both the population and percentages for many ancestry groups.
You can see similar information for other states.
NB: People could belong to one or more ancestry groups.
Related Topics: Illinois ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census Bureau.
Illinois Population By Ancestry in 2021
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| Ancestry | Population | Percent of Population (%) |
|---|---|---|
| Other Groups | 4477034 | 34.92 |
| Unclassified | 2596930 | 20.25 |
| German | 2151981 | 16.78 |
| Irish | 1397290 | 10.90 |
| Polish | 825037 | 6.44 |
| English | 767416 | 5.99 |
| Italian | 719470 | 5.61 |
| American | 449237 | 3.50 |
| Swedish | 236844 | 1.85 |
| French (except Basque) | 200730 | 1.57 |
| European | 169110 | 1.32 |
| Scottish | 143048 | 1.12 |
| Norwegian | 141310 | 1.10 |
| Dutch | 138437 | 1.08 |
| Subsaharan African | 129295 | 1.01 |
| Russian | 105957 | 0.83 |
| Czech | 92655 | 0.72 |
| Greek | 89107 | 0.70 |
| Lithuanian | 74215 | 0.58 |
| African | 70473 | 0.55 |
| Scotch Irish | 68314 | 0.53 |
| Ukrainian | 54259 | 0.42 |
| British | 49134 | 0.38 |
| Welsh | 47720 | 0.37 |
| Hungarian | 44210 | 0.35 |
| Eastern European | 42464 | 0.33 |
| Danish | 41163 | 0.32 |
| West Indian (except Hispanic groups) | 38168 | 0.30 |
| Croatian | 37695 | 0.29 |
| Austrian | 35115 | 0.27 |
| Romanian | 34958 | 0.27 |
| Slovak | 32766 | 0.26 |
| Swiss | 32746 | 0.26 |
| French Canadian | 31698 | 0.25 |
| Scandinavian | 28313 | 0.22 |
| Nigerian | 27353 | 0.21 |
| Belgian | 25280 | 0.20 |
| Serbian | 24530 | 0.19 |
| Yugoslavian | 17933 | 0.14 |
| Palestinian | 17261 | 0.14 |
| Bulgarian | 17200 | 0.13 |
| Jamaican | 16327 | 0.13 |
| Finnish | 16236 | 0.13 |
| Arab | 15081 | 0.12 |
| Assyrian/Chaldean/Syriac | 14512 | 0.11 |
| Albania | 14279 | 0.11 |
| Czechoslovakian | 14251 | 0.11 |
| Northern European | 13633 | 0.11 |
| Canadian | 13267 | 0.10 |
| Slovene | 13030 | 0.10 |
| Lebanese | 11962 | 0.09 |
| Iranian | 11180 | 0.09 |
| Jordanian | 10952 | 0.09 |
| Portuguese | 10422 | 0.08 |
| Haitian | 9425 | 0.07 |
| Egyptian | 9010 | 0.07 |
| Armenian | 8674 | 0.07 |
| Turkish | 7768 | 0.06 |
| Syrian | 7442 | 0.06 |
| Iraqi | 7366 | 0.06 |
| Brazilian | 7046 | 0.06 |
| Ethiopian | 6517 | 0.05 |
| Macedonian | 6221 | 0.05 |
| Ghanaian | 6131 | 0.05 |
| Belizean | 5993 | 0.05 |
| Slavic | 5352 | 0.04 |
| Luxembourger | 5262 | 0.04 |
| Latvian | 5094 | 0.04 |
| Moroccan | 4709 | 0.04 |
| Israeli | 4197 | 0.03 |
| Pennsylvania German | 3973 | 0.03 |
| Australian | 3003 | 0.02 |
| West Indian | 2932 | 0.02 |
| South African | 2369 | 0.02 |
| Sudanese | 2073 | 0.02 |
| Trinidadian and Tobagonian | 1673 | 0.01 |
| Kenyan | 1510 | 0.01 |
| Afghan | 1277 | 0.01 |
| Guyanese | 1262 | 0.01 |
| Estonian | 1070 | 0.01 |
| Maltese | 967 | 0.01 |
| Liberian | 954 | 0.01 |
| Somali | 944 | 0.01 |
| Barbadian | 909 | 0.01 |
| Icelander | 871 | 0.01 |
| Celtic | 778 | 0.01 |
| Senegalese | 667 | 0.01 |
| Ugandan | 619 | 0.01 |
| German Russian | 578 | 0.01 |
| Bahamian | 477 | 0.00 |
| British West Indian | 469 | 0.00 |
| Alsatian | 454 | 0.00 |
| Cajun | 448 | 0.00 |
| Basque | 420 | 0.00 |
| New Zealander | 394 | 0.00 |
| Zimbabwean | 378 | 0.00 |
| Cypriot | 327 | 0.00 |
| Cape Verdean | 250 | 0.00 |
| Dutch West Indian | 205 | 0.00 |
| Soviet Union | 196 | 0.00 |
| Sierra Leonean | 191 | 0.00 |
| US Virgin Islander | 191 | 0.00 |
| Bermudan | 165 | 0.00 |
| Carpatho Rusyn | 146 | 0.00 |